Coffee-making device



Feb. 10, 1942. A. A. PETERS COFFEE-MAKING DEVICE 2 Sheets-Sheet 1Original Filed March 7, 1958 1:NVENTOR. F'E TE F? s v QZQ;

ATTORNEY.

A. A. PETERS COFFEE-MAKING DEVICE Feb. 10, 1942.

Original Filed March 7, 1958 2 Sheets-Sheet 2 'INVENTOR.

A. A. BY 7/;

ATTO EY.

Reisaued Feb. 10, 1942 R 22,022

UNITED STATES PATENT OFFICE COFFEE-MAKING DEVICE Ambrose a. Peters,Milwaukee, Wis.

Original No. 2,190,270, dated February 13, 1940, Serial No. 194,405,March I, 1938. Application for reissue December 10, 1941, Serial No.422,451

5 Claims. (Cl. 53-3) This invention appertains to coflee-making hereinafter more specifically described, claimed, devices, and has for one ofits primary objects and illustrated in the accompanying drawings, in

the provision of a novel coflee urn for restauwhich drawingsrants andthe like, in which the obtaining of a Fi u 1 is a persp ct v view of yimproved uniform, clear infusion of cofl'eeat all times is coffee-makingdevice or urn.

assured without sediment and objectionable in- Fi e 2 an n arged i v i nof gredients. the container for the ground coflfee, with parts Anotherobject of my invention is the provision hereof br n away n in section.illus r in f 8 e-makins device embodying a container the means fordetachably and rotatably connectfor the ground or pulverized cofl'eebeans, with In the container with e means for forcing hot water underpressure up ure 3 18-5 a s e se S on t o the through the ground coffeeinto a suitable disurn taken u sta y on t l n 3-3 f F pensing vessel,the device eliminating the cusi n the d rec o 0 the arrowstomaryprocedure of water gravitating down Figure 4 is a longitudinal sectionthrough he through the ground cofiee, which allows hot it urn. to ensubstantially 0 the line of water to stay in'contact with the groundcoilee li e l oking in the direction of the arrows.

too long a period of time, and which results in Figure 5 is a detailperspective View Of the the water taking up objectionable constituentscove! t of the ground coffee, Figure 6 is an enlarged detail sectionalview A further object of my invention is to provide illustrating themeans o associating the eleca coffee um embodying closed n for tricheating element with the closed boiler, the

ceiving a predetermined quantity of clear water, View b61118 takenSubstantially n t e l e 56 and a container for receiving apredeterminedof u e quantity of ground coffee, whereby a uniform Figure 7 is anenlarged fragmentary bottom grade of coffee can be obtained at all timeswith- P i Of the closed boiler, illustrating e out likelihood of rr r,means oi detachably associating the electric heat- A further object ofmy invention is the pro- 'ihg element therewith vision of novel meansfor forming the container e ring to the drawings in detail, wherein forthe ground ff e, d novel means for similar reference charactersdesignate corresociating the same with the urn, whereby theo spondingpar throughout t e seve l v ews. container can be readily and quicklyplaced for the letter A Senefhlly indicates y p v delivering made cofieeto any desired selected cell-"ee-hilikilig ce which comprises adispensingtank, hollow base Ill, preferably formed of sheet metal Afurther salient object of my invention is the tably treated to Present apleasin pp n provision of a container for the ground mice, 85 Arranged ot e b is an upright Protecting with novel means for forcing hot water upunder hellsihfi easing Whichreceives the cl sed pressure'through thecoffee, the container hayb01181 I2 101 the 0108,! water. The b01181 l2ing novel means for filtering the liquid as the vleiits upon the lie-Sell. and is adapted to be same leaves the container so as to insure theheated by any s r means, such as a gas quick passage of the waterthrough the container 40 burner, e l without ediment, It is preferred,however, to heat the boiler A further object of my invention is the pmbyan electric resistance element ii of the subvision of novel means fordetachably associating 'fl yp T e ele en It s 01 an ated the containerwith the coffee urn, whereby the ehel'eetel substantlellyill-ehflped inP d same canbequickly and expeditiously re-charged the ends of the legsthereof ca y depending with the desired measured quantity of coflee.terminal-i and Which are ri d y Se ured A un further object of myinvention is t to a cover plate l6. This cover plate Hi closes vide animproved cofiee urn or the above char the p nin I formed in the bottomwall or the t which will b bl and m t in boiler l2, which is formed toreceive the reone t t m be simple and easy, to manufacture, sistanceelement. The opening I1 is surrounded and one which can be placed uponthe market at by B reinforcing and 8 Basket t! can be a reasonable cost,v interposed between the cover plate and the rib to with these and otherobjects in view, the inv t se pa e r q d etween the same. 'ventionconsists in the novel construction, ar- Suitable bolts 1 the like can bep y d for rangement, andi'ormation of parts, as will be tillv hold n thecover platein position. The element I3 is introduced into the boilerthrough the opening I! at an angle, and is then swung into its correctposition with the cover plate It in abutting relation to the flange orrib it, after which the cover plate is rigidly secured in place, asdescribed.

Arranged within the housing or casing Ii on top of the closed boiler i2on each side of its transverse center are storage and dispensing tanks2| and 22, which are adapted to receive the made coffee, as will belater set forth. The finished coffee in the tanks 2| and 22 is kept warmby the heat rising from the boiler l2, and; if so desiredelectricheating elements 23 can be provided for each tank so as tomaintain coffee at the desired temperature. The front wall of the base Icarries a switch box 24 for the heating element l2 and the heatingelements 23, and the switch levers 25 for these elements extend throughthe front wall, whereby the flow of current can be ready controlled byan operator.

The casing or housing II is also preferably treated to enhance theappearance thereof, and can be insulated in any desired manner, such asis indicated by the reference character 26 for retaining heat therein.The top of the housing or casing can be closed by removable cover 21,and it is to be noted at this point that the upper ends of the tanks 2|and 22 are left open and that the cover is provided respectively withopenings 28 and 29 to permit the introduction of the made cofiee intothe storage and dispensing tanks.

Any desired type of handle 30 can be provided for the removal cover 21.

Connected with the lower end of the boiler I2 is a. pipe 3i forpermitting the introduction of water into the boiler from a servicemain, or the like, and a hand-operated valve (not shown) can beincorporated in the length of the pipe for controlling the flow of watertherethrough. If preferred, a drain pipe 32 can communicate with thelower end of the boiler for facilitating the draining of water therefromwhen it is desired to wash the boiler. The boiler is also provided witha sight glass 33, so that the operator can readily determine the heightof the water in the boiler. teriorly of the housing or casing l I, andhas communication with the upper and lower ends of the boiler throughthe medium of short pipes 34 and 25.

Extending from the lower ends of the storage and dispensing tanks 2| and22 are outlet or draw-oil pipes 35, and these outlet pipes also extendthrough the front wall of the housing, and have connected therewithdispensing faucets-31. Sight glasses 38 can be connected with the pipes38, so that the height of the coffee in the tanks can be readily seen.

Leading from the closed boiler I2 is a pressure pipe 39, and this pipelikewise leads out through the front wall of the housing or casing II,and is adapted to supply hot water under pressure to the ground coffeecontainer 40, which forms one of the salient features of my invention,and which will be later described in detail. The outer end of thepressure pipe 39 supports a control valve 4|, the outlet end of whichcommunicates with a vertically disposed tube 42, which forms the supportfor the container 40. It is to be noted that the lower end of thepressure pipe 39 terminates short of the lower end of the boiler, andabove the electric resistance element II. This prevents water from beingdrawn from the This sight glass is arranged ex-- boiler below the topface of the element l3, and thus the overheating of the element, and theburning out thereof, is prevented. The position of the pipe 39 alsocontrols the quantity of clear water which is forced through thecontainer 40.

Referring to the ground coil'ee container 40,

4 it will be noted that the same includes a cylindrical side wall 43,anda bottom wall 44, which has axially formed thereon a depending nipple45. This nipple is provided with an interior seat 46 for the ball valve41. A strainer plate 48 is detachably associated with the bottom wall 44above the nipple for forming a support for the ground coffee to preventthe dropping of the ground coffee into the nipple. An interior annularflange 49 is formed on the side wall of the container adjacent to theupper end thereof for supporting the perforated filter plate 50. Thisfilter plate 50 supports at its axial center a depending perforatedfilter tube 5|, which is adapted to extend down into the ground coffee.The filter plate 50, and the tube 5|, are covered by a removablefiltering fabric 52, which can be made from any desired material, andthis filtering fabric can be held in place by a draw-string, or thelike. A handle 53 is connected with the filter plate so as to facilitatethe removal thereof from the container. A removable cover 54 is providedfor the top of the container so as to facilitate the introduction of theground coffee therein, and this cover can be provided with a dependingcollar 55 for engaging the filter plate 50 to hold the same in properposition on its supporting flange 49. The cover 54 can be locked inposition on the container in any desired manner, such as through themedium of a bayonet slot and pin connection 55.

Extending radially from the container 40 above the filter plate 50 is adischarge nozzle 51 for the made coffee, and this discharge nozzle 51 isadapted to be swung into either of the openings 28 or 23, so as to allowthe flow of made coffee into the desired tank 2| or 22.

As heretofore intimatedxthe container 40 is associated with the urn in anovel manner, and thus the upper end of the supporting pipe 42 for thecontainer receives an externally threaded collar-58. The collar 58 hasformed therein an interior shoulder 59 on which rests a control disc 50,having a relatively small axial aperture 6!, through which the hot waterfrom the pipe42 is adapted to flow into the container. The'opening ii isformed relatively small so that a sudden rush of water from the boilerinto'the container will be prevented, and the disc forms means forcontrolling the flow .of water into the container without the minuteadjustment of the valve 4|. Seated on the disc ill is a rubber or likegasket 62, and the nipple 45 of the container is received in the collarand engages the inner face of the gasket. A hand nut 63 is threaded onthe coarse threads of the collar 58, and this hand nut carries adepending annular flange 54, which is adapted to ride between the nipple45 and the collar 58 for engagement with the gasket 62. If preferred, awear ring 65 can be interposed between the flange 64 and the gasket 62.The hand nut 63 can carry any preferred type of hand wheel 66 tofacilitate the turning thereof. 0bviously, when the nut 63 is tightened,the flange 64 will be forced down against the gasket 62 so as to expandthe same into intimate contact with the nipple 45, which will hold thenipple in place.

when it is desired to remove the container,

or change the container on the collar il,'the

hand nut is loosened, which reduces the grip of the gasket on thenipple, and allows easy movement of the nipple.

In use of my improved device, water is introduced into the boiler I!through the pipe II, and the height thereof is observed from the glass31. When the water reaches the desired height, the same is shut off andthe water is then heated by the resistance element It. When suflicientpressure is obtained in the boiler, the water will be forced therefrom,up through the pipe 39, through the supporting pipe 42, and into thecontainer 40. The pressure of the water will lift the valve 41 from offof its seat 46, and thus the free upward flow of the water'isuhhampered. The pressure will force the water up through the groundcofiee in the container, and initially the made coffee will flow intothe bottom of the filter tube As sediment collects on the bottom of thefilter cloth around the tube, the liquid will fiow into the upper end ofthe filtering tube and through the filter plate 50. The container ispositioned so as to dispose the discharge nozzle ll over the desiredtank or receptacle, and when this tank or receptacle is filled, thecontainer can be set so as to position the nozzle over the other tank orreceptacle. The height of the made coffee in the tanks can be readilyobserved by means of the sight glasses 38. A new batch of coffee is madefor each tank or receptacle, so that the made coffee in each tank orreceptacle will be of a uniform strength.

As a measured quantity of water can be introduced into the boiler, and ameasured quantity of coffee placed in the container, a uniform grade ofcoil'ee is assured, without the likelihood of error. If desired, two ormore of the containers 40 can be provided, so that one container canalways be charged with the ground cofl'ee ready for instant associationwith the urn. It preferred, after the coffee is made, the valve ll canbe closed, and the container removed and cleaned, and again re-chargedwith the ground coflee, after which the same can be replaced in itsproper position. Obviously, the check valve 41 prevents the downilow ofliquid from the container into the boiler.

In conjunction with the boiler I2 I also prefer to utilize a relief pipe66, and the upper end of this pipe can carry an adjustable relief valve61. The relief valve 81 can be adjusted so as to control the pressurewithin the boiler l2, and the set of the valve will control withincertain limits the pressure or the water as the same leaves the surepipe leading from said boiler, a container for ground coffee havingcommunication at its lower end with the pressure pipe, a delivery nozzlecarried. by the upper end of the container, and a disc interposedbetween the pressure pipe and the container having a small deliveringorifice.

2. In a device for making coffee, a closed pressure boiler, meansforintroducing water into said boiler, means for heating the water in saidboiler, a pressure delivery pipe communicating with the boiler, acontainer for ground coffee, a depending nipple carried by the lower endof the container, a delivery nozzle carried by the upper end of thecontainer, means connecting the nipple with the pressure delivery pipe,a one-way check valve in said nipple for preventing the down flow ofliquid from the container into the pipe, and a disc having a restrictedorifice disposed between the nipple and the pressure delivery pipe belowthe check valve.

3. In a coffee-making device, a boiler, means for introducing water intosaid boiler, means for heating the water in the boiler, a pressuredelivery pipe leading from the boiler, a container for ground coffeehaving a depending nipple, a delivery nozzle carried by the upper end ofthe container, an externally threaded collar carried by the pressuredelivery pipe, a. gasket received in said collar, the nipple beingreceived in said collar and engaging the inner face of the gasket, ahand nut threaded on the collar, and a depending annular flange on thehand nut engaging the gasket between the nipple and the collar, as andfor the purpose specified.

4. In a beverage producer, a stationary heater, means for controllablyadmitting fresh liquid to said heater, a hot liquid discharge pipefixedly attached to said heater and having a socket at its delivery enddisposed externally of and remote from the heating chamber, a portablecontainer for granular beverage producing material having a hot liquidinlet nipple communicating therewith beneath the granular materialtherein and formed for frictional slip attachment to said socket, anon-return check valve confined within said nipple, and a beveragedispensing downspout carried directly by and communicating with saidcontainer above the granular material therein.

5. In a beverage producer, a stationary heater, inlet means forcontrollably admitting fresh liquid to said heater, a hot liquiddischarge pipe fixedly attached to said heater and having a socket atits delivery end disposed externally of and remote from the heatingchamber, a portable container for granular beverage producing materialhaving a hot liquid inlet nipple communicating therewith beneath thegranular material therein and formed for frictional slip attachment tosaid socket, a non-return check valve confined within said nipple, abeverage dispensing down-spout carried directly by and communicatingwith said container above the granular material therein, a filterinterposed between said spout and the granular material within saidcontainer, and a removable closure cover for the top of said containercoacting directly with said filter.

AMBROSE A. PETERS.

